Tube-lifting device for conveying-troughs.



No. 774,376. PATENTED NOV. `8', 1904.,

J. J. BOAX. TUBE LIFTING DEVICE PGR CONVEYING TROUGHS.

APPLICATION FILED JAN. Z3, 1904.

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J. J. BOAX. TUBE LIETING DEVICE EUR CONVEYING TROUGHS.

APPLICATION PILED JAN. 23, 1904.

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. been used for these purposes; but such prior UNTTED STATES Patented November 8, 1904.

PATENT Ormea.

JOHN J. BOAX, OF MCKEESPORT, PENNSYLVANIA, ASSIGNOR TO NATIONAL TUBE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEV JERSEY.

TUBE-LIFTING DEVICE FOR CONVEYING-THOUGHS.

SPECIFICATION forming part of Letters Patent No. 774,376, dated November 8, 1904.

Application filed January 23, 1904.

To @ZZ whom, it ina/y concern:

Be it lnown that I, JOHN J. BoAX, a resident of McKeesport, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Tube- Lifting Devices for Oonveying-Troughs; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to mechanism for lifting articles out of conveying-troughs in tube and like mills, the object being to provide mechanism for this purpose which is simple of construction and which is mounted on and movable with the trough.

In tube-mills, and more especially in lapweld mills, the tubes are received from the welding-furnace in a trough, out of which they must sometimes be lifted and conveyed to other mechanism or baci; to the furnace for rewelding. Other troughs are provided for conveying the tubes from the welding-furnace to the sizing-rolls and thence to the crossrolls, and it frequently becomes necessary `to also liftvthe tubes out of these last-named troughs. Lifting mechanism has heretofore mechanism comprised either lifting arms mounted at one side of the trough or else a hydraulic lifting-plunger mounted in a pit below the trough.

The present invention has for its purpose mechanism to lift the tubes from any of the troughs of a tube-mill where prior devices forl` this purpose have been used and provides a simpler arrangement than such prior devices;

The invention consists, generally stated, in providing a lifting-finger which is pivoted to one side of the trough and normally lies at the bottom and transversely of the trough, together with a power-cylinder mounted on the trough and having a plunger projecting up through the trough and arranged to contact with the finger and lift the same, whereby all parts of the lifting mechanism are mounted directly on or in the trough and do not project to either side or much below the same.

In the accompanying drawings, Figure lis Serial No. 190,403. (No model.)

a plan view of a portion of a trough, showing my invention applied thereto. Fig. 2 is a side view thereof. Fig. 3 is a plan view of a portion on an enlarged scale. Fig. 4 is a crosssection on the line 4 4, Fig. 1. Fig. 5 is a plan View with the trough removed, and Fig. 6 is an elevation of the cylinder.

The trough may be of any desired construction, that shown in the drawings being a special construction, which, however, has been adopted for purposes of illustration merely. This trough comprises a frame composed of three beams l, 2, and 3. The trough proper, comprising sections 4, is mounted on the beams 1 and 2 by means of legs 5. Intermediate the trough-sections 4 are power-driven rollers 6, mounted in "bearings 7, secured to thepbeams l and 2 and provided with bevelgears 8, meshing with similar gears 9, mounted in bearings 10, connected to the beams 2 and 3 and secured to the longitudinal shaft ll, so as to rotate therewith. This shaft ll will be driven in any suitable way. Any other well-known construction of conveyingtrough might be substituted 'for that shown. v The trough-sections 4 are in general of V shape, as indicated in dotted lines, Fig. 4; but where the lifting devices are located said sections are provided with a side extension 12. In this extension is pivoted, bymeans of a pin or bolt 13, the lifting-finger 14, this being of the curved form shown in Fig. 4 and lying normally transversely of the trough and at the bottom thereof, with its upper face considerably below the top face of the rollers 6 and being rounded on itsupper face, so that the tubes will readily pass over the same. This finger is adapted to be raised to the dotted-line position shown in Fig. 4 in order to lift the pipe out of the trough, this raisingbeing accomplished by means of a plunger 16, projecting up through the bottom of the trough. This plunger may be of vacylinder 18 may be either a hydraulic, steam, or compressed-air cylinder and has connected to its lower end the supply-pipe 21.

Preferably two lifting devices will be used and arranged so as to eng'age the tubes or other articles near their ends. If desired, additional lifting devices may be arranged so as to engage` the article 'intermediate its ends. The supply-pipes for the several cylinders will preferably be brought to a single point and there provided with a valve 22, whereby pressure may be admitted simultaneously into all of the cylinders. This will raise the pistons 17 and plungers 16, and the latter will engage the fingers 14 and raise them to the dotted-line position shown in Fig. 4, thus enabling the tube or other article to roll or slide down the same and onto suitable skids or other supports placed on the side of the trough.

The cylinder 18 is mounted on a plate 24, secured to the lower faces of the beams 1 and 2, and the plunger 16 is square and is guided by means of a plate 25, secured to the upper edges of the beams l and 2. rlhe plunger is provided on the sides at its lower end with outwardly projecting shoulders 26. which will strike the plates 25, and thus limit the upward movement of said plunger and prevent the piston from being entirely thrown out of the cylinder. The plunger is provided with a cylindrical portion 28, which permits it to be turned so as to bring the shoulders 26 out of line with the plates 25, as indicated in dotted lines, Fig. 5, to permit the removal of the plunger. The plunger can be lifted by means of an eyebolt or the like screwed into a hole 29 in the upper end of the plunger.

The lifting-fingers 14 are practically selfcontained in the trough, not projecting' laterally therefrom to any considerable extent. The power-cylinders for actuating the same are mounted directly on the trough or troughframe, and consequently when the trough is moved for the purposes of adjustment or otherwise the lifting-fingers and their actuating' mechanisms will b e moved with the same, thus not necessitating any independent movement or adjustment of these devices. The device therefore is much simpler than those heretofore used.

It is obvious that this device can be used for lifting articles other than tubes out of conveying-troughs.

What l claim is- 1. ln a conveying-trough for tube and like mills, the combination of a trough, a liftinglinger pivoted on one side and near the upper edge thereof and lying' transversely in the bottom of the trough, and power mechanism projecting' through the trough and arranged to engage said finger and lift the same.

2. ln a conveying-trough for tube and like mills, the combination of a trough, a lifting'- linger pivoted on one side and near the upper edge thereof and lying transversely in the bottom of the trough, a plunger projecting' through said trough, and a power-cylinder for actuating said plunger.

3. In a conveying-trough for tube and like mills, the combination of a V-shaped trough, a lifting-finger pivoted to the top edge of one side thereof, said finger being curved and lying transversely in the bottom of the trough, and power mechanism projecting through the trough and arranged to engage said finger and lift the same.

11. In a conveying-troug'h .for tube and like mills, the combination of a trough, lifting means therein, and a power-cylinder for actuating said lifting means, said power-cylinder being' mounted directly on said trough.

5. In a conveying-trough for tube and like mills, the combination of a trough, lifting means therein, a plunger projecting through said trough and arranged to actuate said lifting means, and a power-cylinder for actuating said plunger, said power-cylinder being mounted directly on said trough.

6. In a conveying-trough for tube and like mills, the combination of a trough comprising longitudinal beams and a trough member thereon, a lifting-plunger projecting through the bottom of said trough, and a power-cylinder for actuating said plunger, said cylinder being mounted on said beams.

7. In a conveying-trough for tube and like mills, the combination of a trough, lifting' means therefor, a power-cylinder, a plunger actuated thereby and arranged to operate the lifting means, said plunger being ofinvertedcup shape and surrounding said cylinder, a shoulder on said plunger, and a stop on the trough in the path of said shoulder.

8. ln a conveying-trough for tube and like mills, the combination of a trough, lifting means therein, a power-plunger for actuating said liftingmeans, said plunger being polygonal in cross-section and provided with a cylindrical portion, a shoulder on said plunger extending beyond the fiat side thereof, and a stop on the trough opposite one of the flat sides of the plunger and in the path of said shoulder.

In testimony whereof I, the said JOHN J. BoAX, have hereunto set my hand.

JOHN J. BOAX. l/Vitnesses:

ROBERT C. TOTTEN, G. KREMEP..

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